Automatic projection apparatus.



. GUIERZOWAIIAA W. PECHMRANZ.

AuToAAAnc PROJECTION APPARATUS.

APPLICATION FILED MAYIZ. I9ll.

Ammm; AAAAAAAAAW. 23, A9115.l

5 SHEETS-SWEET l.

I. GuER'zoIII @I R. PECHKIIAIIZ.

AUTOMATIC PROJECTION APPARATUS'. APPLICATION FILED MAY I2."I 9II.

Patented Nov'. 23, 12H5.

1. GUERZONI & R. PECHKIANZ.

AUTOMATIC PROJECTION APPARATUS.

APPucATmN FILED MAY12,1911.

TLTL. Patented Nov. 23, 12H5.

5 SHEETS-SHEET 3.

l. GUERZONI @I R. VPCHKPANZI AUTNIATIC PROJECTION APPARATUS. APPLICATIONFILED MAY I2. I9I1.

vPatented Nov. 23, 1915,

@SHEETS-,SHEET 4. v

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l. GUERZONI & R. PECHKRANZ.

AUTOMATIC PROJECTION APPARATUS.

APPLlcATloN man MA1/12,1911.

Patented Nov. 23, 1915.

5 SHEETS-SHEET 5. y

To 'whom t may concern:

aannam.'

Beit hewn that we, Josmn Gimnzom andl Rononrnm Fncnxnanz, citizens ofSwitzerland, residing atGeneva, Canton ot Geneva, in the `Confederationof Switzerland, have invented certain new and useful lmproviements vinand Relating to Automatic Projection Apparatus, of which the followingis a specification.

Uur present invention 'relates to that class of picture projectingmachines in which there-is a rotating receptacle or magazine for theplates which carry the pictures to be projected, an apparatus forautomatically and successively projecting these pictures on' atransparent screen which forms the front wall of a casing or a box inwhich the other parts are contained, so that the dimensions of theapparatusl are relatively small, vnotwithstanding the fact that it maycontain a great many pictures.

In our improved apparatus, the rays of light are reected within thecasing by three mirrors the planes of which form a prism with thetransparent front wall of the casing; this redection takes place in sucha'manner that the rays of light describe a closed path, in which theycross three times within the casing or box. The light is first reiiectedby a small mirror to a larger one arranged in the up er part of thecasing, and from this secon mirror to a third one, which is larger thanthe second mirror, and is also arranged within the casin du order tomake it possible to employ a large number of pictures the plates arearranged side by side in a revoluble cylindrical magazine, in radialpositions, and by the use of a suitable mechanism, in the projection ofthe pictures, these plates are brought successively into the path of therays of light. The apparatus is driven by a motorv w ich isadvantageously placed within thecasing. In order to obtain a noiselessand positive working of the apparatus the actuating mechanism ispreferably driven indirectly by the motor, as will be hereinafterparticularly described.

lln the accompanying drawing Figure 1 is a vertical section of anapparatus embodying our present invention. Fig. 2 is a plan view on anenlarged scale showing one end ci the apparatus, Fig. 2 is a plan Viewalso on an enlarged scale showing the other end of the apparatus, andFigs. 3 to 10 are Speciloation of Letters Patent.

ll1 and a cam shaft Z l(Fig. 2).

Fatented Nov. 23, tml.

Application med May It, w11. Serial No. ttt't.

detail views of the dierent parts of the apparatus.

Referring to the drawing we prefer to employ a casing or box the yfrontwall of which 1s formed by a frame a (Fig. 1) in which is secured atransparent screen a1. ln the lower part of the box or casing is fixedthe mechanism for driving the plates which carry the pictures, a sourceof light e, a condenser d, a first mirror b, and an 0bjective lens f. Aswill be understood instead of the mirror b a prism may be employed.

.ln the upper part of the casing or box mirrors b1, b2 are arranged.rlhese mirrors reflect the'rays of light to the screen al, as 1s shownin Fi 1. The source of light c (Figs. 1, and 3 the condenser'd, themirror b, the objective lens f and the guides e for the upper part ofthe plates carrying the pictures are all arranged on a supportplate g.Below this plate g a cylindrical magazine h is revolubly mounted on aninclined spindle k3 as shown in Figs. 1 and 10. lln this magazine theplates z', carrying the pictures, are arranged so that they can be movedfreely in guide-grooves, provided in the side walls of the magazine andwhen in place the-plates are in radial positions iii themagazme.4'llhese guide-grooves are indicated by h2 in Fig. 9 of the drawing.

The mechanism by which the parts are operated (Figs. l and 3) preferablycomprises a motor lc (Fig. 2), a worm cl, a wheel 0n this shaft a firstcam Z2 is fixed for driving a mechanism by means of which the plates aredisplaced one after' the other in their own plane,'in such a manner thatthe upper part of each successive plate moves in its guides e while thelower part remains in the magazine.

The details of this mechanism are shown in Figs. 4: and 5. rlhismechanism comprises an arm mwhich carries a pulle}7 m1 adapted to bearagainst the periphery of the cam Z2 and is maintained in positionagainst this periphery by means of a spring m2 which acts upon the arm mas shown in Y At one end the latter is provided with a guide bar 111,7(Fig. 5) which moves in guides 111,8, 1n,9 on the frame, and at theother vend of the cross lpiece 1n,6 there is a bar 111,10 which slidesin a guide 111,11 on the frame. As often as the pulley 111,1 enters therecess Z3 in the cam Z2 the bar 111,10 enters one of the holes h1 (Figs.2 and 9) in-the bottom of the magazine and raises the plate in thecorresponding grooves .1F by exerting an up ard pressure on the loweredge of the plate. The upper part of theplate whichhas been raisedenters the guides'e (Fig. 6) and the upper edge of the plate contactswith a shoe 111 which is plvoted on one end of an arm 111 of a lever 11.r1`he lever 11, is pivoted at 112 on one of the guides e and is providedwith an arm 11,3 the free end of which forms a head with oppositelyinclined planes 111, 11,5. Moving upon these planes is a pulley 11,Gmounted in the end of 4 an arm 111.\vl1ich is pivoted on the other guidee. The arm 117 is further connected to the other guide by a spring 1111whlch tends to maintain the pulley 11,6 in contact with the inclinedplanes of the head of the arm 113. Whenever a platez' is raised thelever 11 is rocked whereby the pulley 116 leaves the inclined plane 111andis brought on to the inclined plane As soon as the pulley is broughtonto thev plane 11,5 the pressure exerted by the pulley 111 upon 115causes the lever 11 to swing until the free end of the arm no contactswith one side of the raised plate and maintains the same in itsposition, with the lower part of the plate still remaining in themagazine.

r1`he upper end of the bar 1111 (Figs. 3 and 6) is pivoted to the lever11 and the lower part of the bar 1111 is adapted to slide in a guideprovided therefor in the plate g. The lower end of the bar 11,11contacts at -certain times with a head piece 01 0f a bar 0, which, ispivoted to one of the ends of a lever o1,

and which slides in a guide 02 fixed on the frame. This lever 03 isactuated by a spring o5 which is shown in Fig. 3 and by which a pulley01 mounted in the opposite end of the lever o3 is pressed against theperiphery of a cam Z1 which is also fixedl on the cam shaft Z. The camZ1 is provided with a recess Z5 and a face against which during a partofthe revolution of the cam the spring acting upon the lever o3 maintainsthe pulley o1. The pulley o4 moves on the periphery of the cam and fallsinto the recess Z5 whereby the lever o3 is rocked and the head o1 movedupwardly and brought against the lower end of the bar 1111,' t0 rock thelever 11, (Fig. 6). In this manner the. pulley 11 is brought back to theinclined plane 11,4 of the head of the arm 113. The pressure of thepulley on this inclined plane causes a rocking movement of the lever 11,in the opposite direction during which the shoe 11.18 attached to theend of sented in Figs. 7 and 8 is driven in order todrive the magazine.This mechanism preferably comprises a suitably mounted oscillating shaftp to which is fixed an arm p1 carrying a spring actuated pawl p2, thetooth of 'which enters the holes h1 in the bottom of the magazine. Fixedon the shaft p is another arm p3 which is actuated by a spring p1, andthe arm ps'carries a pulley 71 which by the spring p1 is pressed againstthe periphery of the cam Z, The cam Z0 is provided with a recess, andthe face Z7 is so formed that during a part of a revolution of the camthe spring p4 gradually expands, whereby simultaneously the pawl 71 ismoved gradually backward from the right to the left in Fig. 7. Duringthe movement of the-pulley p5 on the face Z8 of the recess of the camZGthe spring p4 is compressed and causes the advancement of the pawl p1.The latter engages a hole h1 in the magazine and imparts a progressivemovement to the magazine. The magazine is then, after having been moveda predetermined distance, maintained in its new position by a springactuated bar 1' (Figs. 211,4 and 5) which 1s provided on one end with anobtuse point which successively enters the holes k1, so that themagazine is intermittently stopped and maintained in such a positionthat the bar 111,1o may enter one of the holes 11. Loosely mountedon theshaft Z we also employ two eccentric weights s which are each providedwith a pin s1 and a pin .92 (Fig. 2). These pins s1 are engaged by a pinZ1 which is carriedby a collar t fixed on the shaft Z. During -therotation of the, shaft Z the weights s are alternately swung by the pint1 during a part of each revolution of the shaft until the center of.gravity of each weight is carried above the axis of the shaft Z andpasses the vertical plane which passes through this axis, so that theweights successively turn approximately half a revolution under theaction of the force of gravity. During this latter movement the pins s1(Figs. 2, 3 and 4) of the weights s act alternately upon a pin u1 which1s carried by a headv piece fixed on the lower end of a bar u (Fig. 3).At its upper end, the bar u carries a shutter fv. The bar u is inclinedso that the shutter 11 by its own weight is maintained in both itsclosed and open positions, the changeof the shutter from one of thesepositions` in which it prevents the passage of the rays of light fromthe source of light c to the condenser d, to the other position in whichit permits the passage of the mennen y tu brings the recess Z3 of thecam Z2 opposite the pulley m1 which enters the same, while the arm moscillates under the action of its spring and brings the upper part ofone of the plates of the magazine into the guides e.

One of the weights s then effects the opening of the shutter @in such amanner that the light is permitted to pass and the image appears on thescreen al until the second weight sedects the closing of the shutter.During this time the bar m10 is gradually returned and the spring of thearm m is set for a new movement. After the closing of the shutter therecess Z5 of the cam Zt comes opposite the vpulley o* which enters itcausing the plate to return to its resting position in the magazineWhereafter the pulley gli rolls on the face Z8 of the cam Z and t e pawlp2 causes the magazine to advance. At this moment the cam-shaft hasturned a whole revolution and the diderent parts of the apparatus arereturned to the positions shown in the drawing and hence are again readyfor producing, in an analogous manne'r, the projection of the second andsuccessive pictures.

We claim as our invention:

1. ln an apparatus for projecting pictures, the combination with aframe, a revoluble magazine and optical devices above said magazine forprojecting pictures, of a motor, a shaft turned thereby, a cam on saidshaft, a rocker arm, a roller carried by the rocker arm, means formaintaining. the said roller against the face of the said cam, a crossbar, a connection between the said cross bar and rocker arm so that thesaid cross bar may be raised and lowered by the movement of the rockerarm, a reciprocating bar connected to the said cross bar and adaptedwhenraised thereby to engage the edge of a plate in the said magazine toraise the same into position for projecting, de` vices for holding theplate in its raised position and after use returning it to the saidmagazine, and means `for imparting a step by step movement to the saidmagazine.l

2. ln an apparatus for projecting pictures, the combination with aframe, a rev` oluble magazine and optical devices above said magazinefor projecting pictures, of a motor, a shaft turned thereby, .a cam onsaid shaft, a rocker arm, a roller carried by the rocker arm, means formaintaining the said roller against the face of the said cam, a i

cross-iban, aconnection between the said cross .bar-and rockerarm sothat-the said cross :bar may be raised and lowered by` the movementofthe rockerarm, areciprocating bar connected. to the-same cross bar andadapted when raised thereby to engage the edge cfa plate in the saidmagazine to raise the same into position for projecting, a three-armedlever, a plate engaging member connected to one of the arms ofsaid leverand adapted. to be engaged by the plate when raised from its position insaid magaz1ne, to move the second arm of said lever into engagementwith-one side of the raised plate, inclined faces at one end ofthe-third arm ofV the said lever, a control lever pivotally mounted. atone end, a roller carried by the free end of the said control lever andadapted to engage said inclined faces at the end of the third arm of theaforesaid lever to maintain the same in both its operative andinoperative positions, a second cam on the said shaft, devices operatedby the said second cam for moving the said three-armed lever from itsoperative to its inoperative positions, and means for imparting a stepby step revoluble movement to said maga- ZlIle.

- 3.' ln an apparatus for projecting pictures, the combination with aframe, a revoluble magazine and optical devices above lsaid magazine forprojecting pictures, of a motor, a shaft turned thereby, a cam on saidshaft, a rocker arm, a roller carried by the rocker arm, means formaintaining the said roller against the face of the said cam, a

cross bar, a connection between the said cross bar and rocker arm sothat the said cross bar may be raised and lowered by the movement of therocker arm, a reciprocating bar connected to the said cross bar andadapted when raised thereby to engage the edge of a plate in saidmagazine to raise the same .into position for projecting, de-' vicesactuated by a plate in. being raised from its place in the magazine fortempo` rarlly maintaining the plate in its raised position and after usereturningit to its oluble magazine and optical devices aboveA saidmagazine for projecting pictures, of a motor, a shaft turned thereby, acam on the said shaft, a rocker arm, a roller carried by the said rockerarm, means for maintaining the said roller against tlm face of the saidcam, a1- cross bar, a connection between the said 4rocker arm and crossbar whereby through the movement of the rocker arm the cross bar israised and lowered, a reciprocating bar connected to the said cross barand adapted .when raised thereby to engage the lower edge' of a plate inthe said magazine to raisethe same 'to position for projectingfathree-armed lever, oppositely inclined faces at the end of one arm ofsaid lever, 4'an actuating lever pivoted to the frame at one endthereof, a roller mounted on -the free end of the said actuating leverand adapted to engage said inclined faces of the end of one arm of thesaid lever to maintain the same in both its operative and inoperativepositions, a plate engaging member ,pivotally connected to the end ofanother arm of the said lever and adapted to be engaged by the top edgeof a plate when raised from the magazine and by this engagement to throwthe said lever from its inoperative to its operative position 'therebymoving the lever and causing the end of the third arm thereof to engagetheA Imeneer:

sideof thesaid plate tomaintain the same in it'sraised position, andcausing the roller at the end of the said actuating lever to pass'to theother inclined face on the end of the iirst arm of the said lever,thereby maintaining. the same in its operative position, a second cam onthe said shaft, devices operated thereby for moving the said lever from`its operative to its inoperative position a rocker-shaft, a third cam 0nsaid shattrlfor actuating lthe said rocker shaft,

anarm connectedrto the said rocker shaft, a

pawl connected tb the free end of the said arm, a series of spacedprojections on the said magazine through which, by engagement With the.said pawl and actuated lby

